[Resolved] DirectAdmin: problem with log files

I've set up my DirectAdmin with Litespeed (Trial version) by following the user guide at:
litespeedtech.com/support/wiki/doku.php?id=litespeed_wiki:apache:da

The problem is that none of the log files get updated. From the moment that I've shut down the Apache server, there are no new requests logged in the log files.

However, in the Error Log I could see warnings appearing:
2010-08-19 08:15:23.605 [WARN] /usr/local/directadmin/data/users/username/httpd.conf:41: Directive 'suPHP_UserGroup' is not allowed in current context.

These are made with every Litespeed server restart on every virtualhost. I have also found a forum thread about the suPHP_UserGroup warning, saying that the warnings are safe to ignore (litespeedtech.com/support/forum/showthread.php?t=2347).

Would like to give an update that I've tried uninstalling litespeed using the steps from the installation guide (+ removal of the lsws dir completely). Now using newly installed 4.0.17 and still experiencing the problem.